The Mentawai Islands are a chain of about seventy islands and islets off the western coast of Sumatra

Sumatra

Sumatra is an island in western Indonesia, westernmost of the Sunda Islands. It is the largest island entirely in Indonesia , and the sixth largest island in the world at 473,481 km2 with a population of 50,365,538...

 in Indonesia

Indonesia

Indonesia , officially the Republic of Indonesia , is a country in Southeast Asia and Oceania. Indonesia is an archipelago comprising approximately 13,000 islands. It has 33 provinces with over 238 million people, and is the world's fourth most populous country. Indonesia is a republic, with an...

. Siberut

Siberut

Siberut is the largest and northernmost of the Mentawai Islands, lying 150 kilometres west of Sumatra in the Indian Ocean. A part of Indonesia, the island is the most important home for the Mentawai people. The western half of the island was set aside as the Siberut National Park in 1993...

 (4,030 km²) is the largest of the islands. The other major islands are Sipura

Sipura

Sipura, or Sipora located off Sumatra in Indonesia, is the smallest and most developed of the four Mentawai Islands at only 845 km². The regency capital of the Mentawai Islands, Tua Pejat, is found on Sipora. An estimated 10-15% of the original rainforest remains on this island.Sipora is a...

, North Pagai

North Pagai

North Pagai is one of the Mentawai Islands off the west coast of Sumatra in Indonesia. It is south of Sipura and north of South Pagai Island....

 (Pagai Utara) and South Pagai

South Pagai

South Pagai is one of the Mentawai Islands off the west coast of Sumatra in Indonesia. It is south of North Pagai Island...

 (Pagai Selatan). The islands lie approximately 150 km off the Sumatran coast, across the Mentawai Strait

Mentawai Strait

Mentawai Strait separates Sumatra and Mentawai Islands, Indonesia....

. The indigenous inhabitants of the islands are known as the Mentawai people.